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Volume 58 Issue 6
Dec.  2023
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Journal of Southwest Jiaotong University  > 2023  >  58(6): 1423-1431.
JIA Hongyu, WU Weichang, YOU Gang, YANG Lei, PENG Qihui, ZHENG Shixiong. Damage Analysis of Long-Span Continuous Beam Bridges Under Strong Earthquakes[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1423-1431. doi: 10.3969/j.issn.0258-2724.20220072
Citation: JIA Hongyu, WU Weichang, YOU Gang, YANG Lei, PENG Qihui, ZHENG Shixiong. Damage Analysis of Long-Span Continuous Beam Bridges Under Strong Earthquakes[J]. Journal of Southwest Jiaotong University, 2023, 58(6): 1423-1431. doi: 10.3969/j.issn.0258-2724.20220072
shu

Damage Analysis of Long-Span Continuous Beam Bridges Under Strong Earthquakes

doi: 10.3969/j.issn.0258-2724.20220072
  • 1.

    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • 2.

    China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

  • 3.

    Yellow River Planning Survey and Design Academe Co., Ltd., Zhengzhou 450003, China

  • 4.

    School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • Received Date: 24 Jan 2022
  • Rev Recd Date: 27 Mar 2022
    • Available Online: 13 Sep 2023
  • Publish Date: 21 Apr 2022
    Abstract

  • The continuous beam bridge is often damaged or even collapses due to the earthquake and thus loses its traffic function. Therefore, it is important to study the damage mechanism of large-span continuous beam bridges under strong earthquakes to improve the bridge collapse resistance. Based on the finite element software ANSYS/LS-DYNA, a three-dimensional numerical model of the damage of a large-span continuous beam bridge under strong earthquakes was established, which considered the material nonlinearity of the bridge pier, the large deformation nonlinearity of the damage process, and the nonlinear collision of the beam end. In addition, nonlinear analysis was performed to visually simulate the damage process of the large-span continuous beam bridge under strong earthquakes. The seismic damage of the large-span continuous beam bridge was analyzed in terms of strain and displacement response, pier damage, and girder-platform collision. The study results show that the damage modes of the one-way ground motion input and two-way ground motion input are basically the same, and the damage mode is determined by the bridge structure, and the ground motion input mode has less influence; the seismic damage of the large-span continuous beam bridge involves a gradual development process; the concrete damage factor of the bridge pier accumulates to 0.99; the bending plastic damage occurs at the bottom of the fixed pier, and the bridge is damaged.

     

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